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SoftGPU: Improve wsum recip SIMD.

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A bit faster.
This commit is contained in:
Unknown W. Brackets 2017-05-13 06:56:33 -07:00
parent 7c526acc69
commit 6b0c9a5531
1 changed files with 12 additions and 3 deletions
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15
GPU/Software/Rasterizer.cpp
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@ -1291,7 +1291,7 @@ inline Vec4<int> TriangleEdge::StepY(const Vec4<int> &w) {
#endif
}
inline Vec4<int> MakeMask(const Vec4<int> &w0, const Vec4<int> &w1, const Vec4<int> &w2, const Vec4<int> &bias0, const Vec4<int> &bias1, const Vec4<int> &bias2) {
static inline Vec4<int> MakeMask(const Vec4<int> &w0, const Vec4<int> &w1, const Vec4<int> &w2, const Vec4<int> &bias0, const Vec4<int> &bias1, const Vec4<int> &bias2) {
#if defined(_M_SSE) && !defined(_M_IX86)
__m128i biased0 = _mm_add_epi32(w0.ivec, bias0.ivec);
__m128i biased1 = _mm_add_epi32(w1.ivec, bias1.ivec);
@ -1303,7 +1303,7 @@ inline Vec4<int> MakeMask(const Vec4<int> &w0, const Vec4<int> &w1, const Vec4<i
#endif
}
inline bool AnyMask(const Vec4<int> &mask) {
static inline bool AnyMask(const Vec4<int> &mask) {
#if defined(_M_SSE) && !defined(_M_IX86)
// In other words: !(mask.x < 0 && mask.y < 0 && mask.z < 0 && mask.w < 0)
__m128i low2 = _mm_and_si128(mask.ivec, _mm_shuffle_epi32(mask.ivec, _MM_SHUFFLE(3, 2, 3, 2)));
@ -1315,6 +1315,15 @@ inline bool AnyMask(const Vec4<int> &mask) {
#endif
}
static inline Vec4<float> EdgeRecip(const Vec4<int> &w0, const Vec4<int> &w1, const Vec4<int> &w2) {
#if defined(_M_SSE) && !defined(_M_IX86)
__m128i wsum = _mm_add_epi32(w0.ivec, _mm_add_epi32(w1.ivec, w2.ivec));
return _mm_rcp_ps(_mm_cvtepi32_ps(wsum));
#else
return (w0 + w1 + w2).Cast<float>().Reciprocal();
#endif
}
template <bool clearMode>
void DrawTriangleSlice(
const VertexData& v0, const VertexData& v1, const VertexData& v2,
@ -1386,7 +1395,7 @@ void DrawTriangleSlice(
// If p is on or inside all edges, render pixel
Vec4<int> mask = MakeMask(w0, w1, w2, bias0, bias1, bias2);
if (AnyMask(mask)) {
Vec4<float> wsum_recip = (w0 + w1 + w2).Cast<float>().Reciprocal();
Vec4<float> wsum_recip = EdgeRecip(w0, w1, w2);
Vec4<int> prim_color[4];
Vec3<int> sec_color[4];